| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 6091 |
24.6%
|
| 2 | Monthly | 3794 |
15.3%
|
| 3 | Yearly | 1412 |
5.7%
|
| 4 | Less often | 3999 |
16.1%
|
| 5 | Not at all | 9471 |
38.2%
|
| Sysmiss | 817 |